Automatic drain-valve.



W. R. HUDDLESTUN. AUTOMATIG DRAIN VALVE.

APPLIUATION FILED AUG. 2e. 1913.

. Patented'Apr. 2,1, 1914.

g, MW

ATTORNEYS UNITED STATES PATENT oEEIcE.

WIDLIAM E. HUDDLEs'roN, or' BE-oWNsvILLE, TEXAS'.

' AUTOMATIC DRAIN-VALVE.

, To all 'Lt-kom'z't may concern.'

Be it known that I, WILLIAM R. HUDDLE- sroN, a citizenof the UnitedStates, and a resident 'of Brownsville, in the county of Cameron andState of Texas, have vmade certain -new and useful Improvements inAutomatic Drain-Valves, of which the following is a specication.

. Myinvention 's an improvement in autos lrttic drain Valt s, and hasfor its object.

. t provide a valve of the character specified,

adapted for use in connection withV the main reservoir of air brakingsystems, for automatically draining the reservoir and the system ofwater, wherein a normally open spring supported valve is provided,adapted" to be closed by the pressure in't-he system,

When'such pressure exceeds the normal atmospheric pressure.

In the drawings: FIgure 1 isa longitudinal section of the improvedvalve, Fig. 2

- described.

The section 1 of the casing is internally threaded at .its upper end,for engagement by the upper section 5 ofthe casing, the

said upper section being of less diameter than the 'section 1, andhaving-its ends externally threaded, as shown at 6 and (il, the threadedportion 6a engaging within the lower section 1.

The threaded portion 6 of the casing is adapted to be engaged withthereservoir, the said reservoir having an opening tapped therein forreceiving the said threaded end 6 of the upper section 5. The valve '7consistsof two truste-conical portions having their large ends together,and the lower truste-conical portion is arranged to fit the seat 4 ofthe valve casing. A stem 8 is integral with the valve, and the said stemis provided with a transverse opening 9 near the valve, and with atransverse longitudinallyA extending slot or recess 10 at its upper end.

Specification of Letters Patent.

Application led August 26,

into the train line A cross head 11 cooperates with the stem,K

Patented Apr. 21, 1914. 1913.v Serial No. 786,772.

the said cross head being received in the slot or recess 10, and thesaid cross head is of a length greater than thediameter of the uppersection of pipe 5 of the casing. A4 coil spring 12 is arranged withinthe pipe 5, and one end of the spring is passed through the opening9 ofthe stem, and bent, as shown at 13, to prevent disengagement of the saidend. The cross head 11 is provided ateach of its ends, and at its loweredge with a notch 14, and with an opening lnear one of the notches.A ofthe coil spring 12 is passed through the opening 15, as indicated at 16in Fig. 1. The upper end of the pipe 5 is provided with diametricallyopposite slots or recesses 17, the said slots or recesses being of alength to receivevthe ends of t-he cross head beyond the notches 14.

In operation, the main reservoir is tapped, as before mentioned, toreceive thethreaded portion (3 of the pipe l The spring 12 is arrangedto hold the valve in the position shown in Figs. 1 and 2, and the slotor recess 10 is of a depth to permit the valve to stand in thisposition, Whernthe ends of the said cross head are received in the slotsor recesses 17, before mentioned.

Asis known, when the air pump ofa braking system' vis working, .itforces a certain per cent.. of water and discharges it into The upperend the main reservoir, and this water backs up i and the sand pipes,and decreases the eiiiciency of the brakes. In addition, the sandiswetted in t and does not flow properly, such sand is carefully bakedto remove as muchmoistureas possible, in order that it may iow freely. Y

The present invention is designed to withdraw this Water, otherwise rustwill form in the reservoir, and as it is carried away by the water it isvalve, decreasing great extent, vand the action of the a'ir and forcedinto the ports of the their eiiciency to a very frequently the brakes.

VVit-h the improved valve all of the Water left in the reservoir will bedrawn off. The spring is not strong enough to hold the valve 1n openposition against the air pressure which acts 'upon the upper facethereof. As

Soon as this pressure is released, the spring will lift the valve, andthe water will drain ofi'. The spring is of such strength that fivepounds pressure on the upper face theree sand pipe, y -v for as known,

preventing the proper action of of will close the same. Thus, four orlive strokes of the air pump would cause the valve to shut, and at notime thereafter'l would it interfere with the proper action of thevalves. The improved valve is so arranged, that the upper end of thepipe 5 will be flush with the inner face of the reservoir, and a fluidtight joint is formed at the point where it engages thereservoir.

I claim:

1. A valve casing for use in air brake systems for draining the systemand comprising a pipe having its ends threaded and adapted to engage atone end themain reser- -voir of the system at the lower side thereof, a

casing engaging the lowerend of the pipe, saidv casing having its lowerend partially closed and provided with a central opening, and with atapered valve seat encircling the opening, a valve fitting the seat forclosing the same, said' valve having a stem extending upward through thepipe, said stem being slotted transversely at its upper end,'a`

crosshead in the slot, the rst-namedlpipe having diametrical recessesfor receiving the ends of the cross head, and a coil spring encirclingthe stem, said spring having one of its ends connected with the crosshead and the other with the stem, and acting normally to hold the valvein open position, said spring being adapted to yield to close the valvewhen the air pressure increases in the reservoir.

2. A valve casing for use in air brake sysi tems for draining the systemand comprising a pipe having its ends threaded and adapted to engage atone end the reservoir at the Copies of this patent may be obtained forlower side thereof, a casing engaging the lower end-of the pipe, saideasing liavlng its lower end partially closed and provided with acentral opening, and with a tapered valve seat encircling the opening, avalve fitting ythe seat for closing the saine, said valve having a stemextending upward through the pipe, said stem being slotted transverselyat its upper end, a cross head in the slot, the first-named pipe havingdiametrical recesses for receiving the `ends of the Cross head, a springbetween the cross head and the stern and acting normally to hold thevalve open `and adapted to yield when the air pressure in the reservoirexceeds the atmospheric pressure.

3. A valve casing for use in air brake systems,and comprising a pipeadapted for enageinent with the system atl one end, a casing detachablyconnected with the other end of the pipe and having the end remote fromthe pipe partially closed and provided with a central port, a valvecoperating with the port for closing the same, a stein in connec-` vecents each, by addressing the Commissioner of Patents,

f Washington, D. C.

